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hornScrimp

Create Scrimp horn antenna

Since R2021a

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    Description

    The default hornScrimp object creates a Scrimp horn antenna resonating around 3.91 GHz. Scrimp (short circular ring loaded horn with minimized cross-polarization) horn antenna is a short, axially corrugated horn antenna with a single slot. Using this antenna provides high aperture efficiency, low cross-polarization, and low voltage standing wave ratio (VSWR) over a broad frequency band. These antennas are used for navigation satellite feeder links in a medium earth orbit (MEO).

    Scrimp horn antenna geometry, default radiation pattern, and impedance plot.

    Creation

    Syntax

    ant = hornScrimp
    ant = hornScrimp(Name,Value)

    Description

    ant = hornScrimp creates Scrimp horn antenna with default property values. The default dimensions are chosen for an operating frequency of around 3.91 GHz.

    example

    ant = hornScrimp(Name,Value) sets Properties using one or more name-value pairs. For example, hornScrimp('ConeHeight',0.05) creates Scrimp horn antenna with the cone height of 0.05 meters.

    example

    Properties

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    Radius of the circular waveguide, specified as a positive scalar in meters.

    Example: 'Radius',0.0760

    Example: ant.Radius = 0.0760

    Data Types: double

    Height of the circular waveguide, specified as a positive scalar in meters.

    Example: 'WaveguideHeight',0.0340

    Example: ant.WaveguideHeight = 0.0340

    Data Types: double

    Height of the feed, specified as a positive scalar in meters.

    Example: 'FeedHeight',0.0085

    Example: ant.FeedHeight = 0.0085

    Data Types: double

    Width of the feed, specified as a positive scalar in meters.

    Example: 'FeedWidth',0.0200

    Example: ant.FeedWidth = 0.0200

    Data Types: double

    Signed distance along the waveguide height, specified as a real-valued scalar in meters.

    Example: 'FeedOffset',0.03627

    Example: ant.FeedOffset = 0.03627

    Data Types: double

    Height of the cone, specified as a positive scalar in meters.

    Example: 'ConeHeight',0.0540

    Example: ant.ConeHeight = 0.0540

    Data Types: double

    Radius of the cone, specified as a positive scalar in meters.

    Example: 'ConeRadius',0.0540

    Example: ant.ConeRadius = 0.0540

    Data Types: double

    Radius of the cone aperture, specified as a positive scalar in meters.

    Example: 'ApertureRadius',0.0760

    Example: ant.ApertureRadius = 0.0760

    Data Types: double

    Height of the cone aperture, specified as a positive scalar in meters.

    Example: 'ApertureHeight',0.0760

    Example: ant.ApertureHeight = 0.0760

    Data Types: double

    Height of the stub, specified as a positive scalar in meters.

    Example: 'StubHeight',0.0760

    Example: ant.StubHeight = 0.0760

    Data Types: double

    Type of the metal used as a conductor, specified as a metal material object. You can choose any metal from the MetalCatalog or specify a metal of your choice. For more information, see metal. For more information on metal conductor meshing, see Meshing.

    Example: m = metal('Copper'); 'Conductor',m

    Example: m = metal('Copper'); ant.Conductor = m

    Tilt axis of the antenna, specified as:

    • Three-element vector of Cartesian coordinates in meters. In this case, each coordinate in the vector starts at the origin and lies along the specified points on the X-, Y-, and Z-axes.

    • Two points in space, each specified as three-element vectors of Cartesian coordinates. In this case, the antenna rotates around the line joining the two points in space.

    • A string input describing simple rotations around one of the principal axes, 'X', 'Y', or 'Z'.

    For more information, see Rotate Antennas and Arrays.

    Example: 'TiltAxis',[0 1 0]

    Example: 'TiltAxis',[0 0 0;0 1 0]

    Example: ant.TiltAxis = 'Z'

    Tilt angle of the antenna, specified as a scalar or vector with each element unit in degrees. For more information, see Rotate Antennas and Arrays.

    Example: 'Tilt',90

    Example: ant.Tilt = 90

    Example: 'Tilt',[90 90],'TiltAxis',[0 1 0;0 1 1] tilts the antenna at 90 degrees about the two axes defined by the vectors.

    Data Types: double

    Lumped elements added to the antenna feed, specified as a lumpedElement object. You can add a load anywhere on the surface of the antenna. By default, the load is at the feed. For more information, see lumpedElement.

    Example: 'Load',lumpedelement, where lumpedelement is the load added to the antenna feed.

    Example: ant.Load = lumpedElement('Impedance',75)

    Object Functions

    axialRatioCalculate and plot axial ratio of antenna or array
    bandwidthCalculate and plot absolute bandwidth of antenna or array
    beamwidthBeamwidth of antenna
    chargeCharge distribution on antenna or array surface
    currentCurrent distribution on antenna or array surface
    designDesign prototype antenna or arrays for resonance around specified frequency or create AI-based antenna from antenna catalog objects
    efficiencyCalculate and plot radiation efficiency of antenna or array
    EHfieldsElectric and magnetic fields of antennas or embedded electric and magnetic fields of antenna element in arrays
    feedCurrentCalculate current at feed for antenna or array
    impedanceCalculate and plot input impedance of antenna or scan impedance of array
    infoDisplay information about antenna, array, or platform
    memoryEstimateEstimate memory required to solve antenna or array mesh
    meshMesh properties of metal, dielectric antenna, or array structure
    meshconfigChange meshing mode of antenna, array, custom antenna, custom array, or custom geometry
    msiwriteWrite antenna or array analysis data to MSI planet file
    optimizeOptimize antenna or array using SADEA optimizer
    patternPlot radiation pattern and phase of antenna or array or embedded pattern of antenna element in array
    patternAzimuthAzimuth plane radiation pattern of antenna or array
    patternElevationElevation plane radiation pattern of antenna or array
    peakRadiationCalculate and mark maximum radiation points of antenna or array on radiation pattern
    rcsCalculate and plot monostatic and bistatic radar cross section (RCS) of platform, antenna, or array
    resonantFrequencyCalculate and plot resonant frequency of antenna
    returnLossCalculate and plot return loss of antenna or scan return loss of array
    showDisplay antenna, array structures, shapes, or platform
    sparametersCalculate S-parameters for antenna or array
    stlwriteWrite mesh information to STL file
    vswrCalculate and plot voltage standing wave ratio (VSWR) of antenna or array element

    Examples

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    Open Live Script

    Create Scrimp horn antenna with default properties.

    ant = hornScrimp
    ant = 
  hornScrimp with properties:

             Radius: 0.0292
    WaveguideHeight: 0.0250
         FeedHeight: 0.0175
          FeedWidth: 3.0000e-04
         FeedOffset: 0.0200
         ConeHeight: 0.0362
         ConeRadius: 0.0408
     ApertureRadius: 0.0480
     ApertureHeight: 0.0250
         StubHeight: 0.0146
          Conductor: [1x1 metal]
               Tilt: 0
           TiltAxis: [1 0 0]
               Load: [1x1 lumpedElement]

    View the antenna using the show function.

    show(ant)

    Figure contains an axes object. The axes object with title hornScrimp antenna element, xlabel x (mm), ylabel y (mm) contains 3 objects of type patch, surface. These objects represent PEC, feed.

    Plot the radiation pattern of the Scrimp horn antenna at a frequency of 4 GHz.

    pattern(ant,4e9)

    Figure contains 2 axes objects and other objects of type uicontrol. Axes object 1 contains 3 objects of type patch, surface. Hidden axes object 2 contains 17 objects of type surface, line, text, patch.

    Open Live Script

    Create Scrimp horn antenna with the aperture radius of 0.06 meters. 

    ant = hornScrimp;
ant.ApertureRadius = 0.06;

    Visualize the antenna using the show function.

    show(ant)

    Figure contains an axes object. The axes object with title hornScrimp antenna element, xlabel x (mm), ylabel y (mm) contains 3 objects of type patch, surface. These objects represent PEC, feed.

    Plot the S-parameters over a frequency range of 3.6 GHz to 4.5 GHz.

    s = sparameters(ant,linspace(3.6e9,4.5e9,51));
rfplot(s)

    Figure contains an axes object. The axes object with xlabel Frequency (GHz), ylabel Magnitude (dB) contains an object of type line. This object represents dB(S_{11}).

    More About

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    References

    [1] Muhammad, S. A., A. Rolland, S. H. Dahlan, R. Sauleau, and H. Legay. “Hexagonal-Shaped Broadband Compact Scrimp Horn Antenna for Operation in C-Band.” IEEE Antennas and Wireless Propagation Letters 11 (2012): 842–45.

    [2] Muhammad, S., A. Rolland, S. H. Dahlan, R. Sauleau and H. Legay. “Comparison Between Scrimp Horns and Stacked Fabry-Perot Cavity Antennas with Small Apertures.” 2012 6th European Conference on Antennas and Propagation (EUCAP) (2012): 817–820.

    Version History

    Introduced in R2021a

    See Also

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